in a study of the effectiveness of arthroscopic knee surgery, researchers randomly assigned patients with knee pain into three groups: one group to receive arthroscopic debridement, one to receive arthroscopic lavage, and the third to receive simulated arthroscopic surgery in which the surgeon made small incisions without inserting instruments. all patients were then followed up by their surgeons to measure improvements in pain and functional ability

1/4 and 8/3 because:

the reciprocal if 4 is 1/4 because 4 is used as 4/1 and the opposite of that is 1/4. the opposite of 3/8 is 8/3 so that is the answer.

x=-2

infinite number of lines, so there is an infinite number of equations.

step-by-step explanation:

there are an infinite number of line that passes through the point (-2,5)

x=-2   is one line that passes through the point

y = 5 is another line that passes through the point

(these two lines are perpendicular to each other).

since the number of   numbers are infinite and the slope is the ratio of two numbers,(change in y over change in x) we can have an infinite number of slopes.     our only condition is that it passes through the point (-2,5)

44

step-by-step explanation:

the

the answer is "add 2y and y"

step-by-step explanation:

you need to collect the like terms first.